US792160A - Plumb-level. - Google Patents

Description

UNITED STATES Patented June 13, 1905.

PATENT EEicE.

CHARLES V. PARRISH AND HOVARD F. REILLY, OF FORTYFORT, PENNSYLVANIA.

PLUIVIB-LEVEL.

SPECIFICATION forming part of Letters Patent No. 792,160, dated June 13, 1905.

Application filed December l5, 1904. Serial No. 236,976.

To ./IZZ whom, it 77u07/ concern.-

Be it known that we, CHARLES V. PARRISH and HOWARD F. REILLY, citizens of the United States, residing at Fortyfort, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Plumb-Levels; and we do declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in plumb-levels of that class in which a pointer cooperates with a dial to indicate the angle.

One object of our invention is to provide a simple and efficient leveling device of this character which may be readily and accurately mounted in a leveling-bar and which may be easily adjusted to counteract any inaccuracy due to wear, rough handling, or other causes.

Another object of oui invention is to provide means upon the plumb-level for indicating the pitch in inches per foot.

With the above and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of a plumb-level constructed in accordance with our invention. Fig. 2 is a vertical longitudinal sectional view through the same. Figs. 3 and et are horizontal and vertical sectional views, taken, respectively, on the lines 3 3 and 4 4 in Fig. 2; and Fig. 5 is an enlarged detail view of a portion of the dial, showing graduations thereon for indicating the pitch or batter in inches per foot.

Referring to the drawings by numeral, 1 denotes a leveling-bar which is formed at its center with a substantially circular, transverselyextending opening 2 and a substantially circular bore or recess 3, which latter extends at right angles to said opening 2 and has its inner end communicating' with the same and its outer end opening upon the top edge or face of said bar. Adjustably mounted in the said opening2 is the casing 4 of a leveling device, preferably of the plumb-level type, as illustrated. This casing comprises a circular body or ring of slightly less diameter than the opening 2 and is formed upon its outer surface or periphery, at diametrically opposite points, with a tongue 5 and two spaced ears or lugs 6, which latter are formed with alining openings or slots 7, as seen in Fig. 3 of the drawings. The adjustment of said casing is effected by seating said tongue 6 in a recess 8, formed in the bar 1 at one side of the opening 2 and by providing in the bore or recess 3 an adjustingscrew 9, which has its threaded inner end 10 working in a similarly screw-threaded opening formed in a block 11, which has pivotstuds 12 projecting into the said openings or slots 7 in the ears 6. The outer end or head 13 of the screw 9 is swiveled, as shown at 14, in a plate 15, which issecured by screws 16 in a recessed portion of the bar, as seen in Fig. 2 of the drawings. It will be seen that when the screw 9 is operated the casing 4 will be moved or adjusted in the opening 2, the tongue 5 acting as a pivot for the casing. v

The plumb-level comprises a pointer or indicator 20, which is pivotally mounted intermediate its ends between parallel arms 21, which project from the oppositely beveled or inclined edges 22 of the opening 23 in the body of the casing 4. The pivotal mounting of the indicator or plumb 2O is preferably eected, as shown, by seating the tapered ends of its pivot 24 in conical bearings formed in set-screws 25, which aremounted in the ends of said arms 21. The indicator or plumb has a pointed upper end 26, which coacts with a scale or graduations 27, formed upon the upper half of an annular rib or iiange 28, which projects inwardly from the beveled edges or faces 22 of the opening 23, and the lower end 29 of said indicator-plumb 2O is weighted, as shown at 30, and formed with a segmental-shaped portion 31, upon which is provided a scale or graduations 32, which coact with a scale or graduations 33 upon the lower half of the said i'lange 28. The graduations 33, which indicate the angle, are numbered from "1 to "90, as shown in Fig. 5, and the graduations 27, which indicate the pitch or batter in inches per foot, are numbered from l to "12.

These scales or graduations are placed upon both sides or faces of the liange and the indicator, so that the device may be read from eitherside, and to protect these parts the outer ends ot' the opening 2 in the bar l are closed by glasses 34, which are secured in place, as shown, by annular metal plates or rings 35, screwed or otherwise secured upon the side faces of the bar.

The bar l may be of any desired construction; but we preferably provide upon each of its ends the usual metal guard-plates 36 and adjacent to each of its ends spirit-levels 37 and 38, which are disposed at right angles to each other, as shown.

From the foregoing description, taken in connection with the accompanying' drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

In a level, the combination of a bar having a transverse opening and a recess at one side of said opening, a casing in said opening having a tongue at one side engaged with said recess and provided at its opposite side with a pair of spaced lugs, a block pivoted between said lugs, a screw having a swivel connection with the bar and engaged with the said block to adjust said casing, an annular ange in the casing having scale-graduations thereon, bearings carried by the casing, and a weighted pointer pivotally mounted between the bearings and coacting with the scale-graduations.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

CHARLES V. PARRISH. HOWARD F. REILLY.

W itnesses: CHAs. W. DANA, l ALEX P. IooNs.

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